DOT HS 813 093 May 2021 Special Crash Investigations: Crash Avoidance Technology Investigation; Vehicle: 2017 Honda Accord; Location: California; Crash Date: October 2018 DISCLAIMER This publication is distributed by the U.S. Department of Transportation, National Highway Traffic Safety Administration, in the interest of information exchange. The opinions, findings, and conclusions expressed in this publication are those of the authors and not necessarily those of the Department of Transportation or the National Highway Traffic Safety Administration. The United States Government assumes no liability for its contents or use thereof. If trade or manufacturers’ names are mentioned, it is only because they are considered essential to the object of the publication and should not be construed as an endorsement. The United States Government does not endorse products or manufacturers. Suggested APA Format Citation: Dynamic Science, Inc. (2021, May). Special Crash Investigations: Crash Avoidance Technology Investigation; Vehicle: 2017 Honda Accord; Location: California; Crash Date: October 2018 (Report No. DOT HS 813 093). National Highway Traffic Safety Administration. Technical Report Documentation Page 1. Report No. 2. Government Accession No. 3. Recipient’s Catalog No. DOT HS 813 093 4. Title and Subtitle 5. Report Date Special Crash Investigations: May 2021 Crash Avoidance Technology Investigation; Vehicle: 2017 Honda Accord; Location: California; 6. Performing Organization Code Crash Date: October 2018 7. Author 8. Performing Organization Report No. Dynamic Science, Inc. DS18026 9. Performing Organization Name and Address 10. Work Unit No. (TRAIS) Dynamic Science, Inc. 26141 Marguerite Parkway, Suite C 11. Contract or Grant No. Mission Viejo, CA 92692 693JJ918C000012 12. Sponsoring Agency Name and Address 13. Type of Report and Period Covered National Highway Traffic Safety Administration Technical Report 1200 New Jersey Avenue SE October 2018 Washington, DC 20590 14. Sponsoring Agency Code 15. Supplementary Notes Each crash represents a unique sequence of events, and generalized conclusions cannot be made concerning the crashworthiness performance of the involved vehicles or their safety systems. This report and associated case data are based on information available to the Special Crash Investigation team on the date this report was published. 16. Abstract This report documents the investigation of a crash involving a 2017 Honda Accord equipped with crash avoidance technology including a crash mitigating braking system (CMBS). This crash occurred in the morning in October 2018 in California. Four vehicles were involved. The lead vehicle was a Cadillac SRX, year unknown, stopped due to stopped traffic in the third lane from the right. A 2008 Honda Civic, which was driven by a 24-year-old male, followed the Cadillac, did not stop, and rear-ended it. The 2017 Honda Accord, driven by a belted 48-year- old female, followed the Civic. The driver of the Accord saw the vehicles stopped ahead, so she braked. The Accord did not stop and rear-ended the Civic. An unidentified vehicle traveling in the fourth lane from the right then side-swiped the left plane of the Accord. Following the crash, the Cadillac and the unidentified vehicle both fled the scene. The two vehicles that remained on-scene were towed due to damage. Neither driver was injured nor transported. The Accord’s CMBS did not activate prior to this crash. Given the crash configuration and speed difference between the Honda and the other vehicle, it would appear that the scenario met the CMBS activation conditions as stated in the Honda owner’s manual. 17. Key Words 18. Distribution Statement crash avoidance, FCW, CMBS, air bag, deployment, crash mitigating The document is available to the braking system public from the National Technical Information Service, www.ntis.gov. 19 Security Classif. (of this report) 20. Security Classif. (of this page) 21 No. of Pages 22. Price Unclassified Unclassified 49 Form DOT F 1700.7 (8-72) Reproduction of completed page authorized i Table of Contents BACKGROUND ........................................................................................................................... 1 SUMMARY ................................................................................................................................... 2 Crash Site .................................................................................................................................. 2 Pre-Crash................................................................................................................................... 2 Crash ......................................................................................................................................... 4 Post-Crash ................................................................................................................................. 5 2017 HONDA ACCORD .............................................................................................................. 5 Description ................................................................................................................................ 5 Exterior Damage ....................................................................................................................... 5 Event Data Recorder ................................................................................................................. 6 Crash Avoidance Technology Discussion ................................................................................ 6 Interior Damage ........................................................................................................................ 9 Manual Restraint Systems ......................................................................................................... 9 Supplemental Restraint Systems ............................................................................................... 9 NHTSA Recalls and Investigations .......................................................................................... 9 2017 HONDA ACCORD OCCUPANT .................................................................................... 10 Driver Demographics .............................................................................................................. 10 Driver Injuries ......................................................................................................................... 10 Driver Kinematics ................................................................................................................... 10 2008 HONDA CIVIC .................................................................................................................. 10 Description .............................................................................................................................. 10 Exterior Damage ..................................................................................................................... 10 Occupant Data ......................................................................................................................... 11 CADILLAC SRX ........................................................................................................................ 11 Description .............................................................................................................................. 11 Exterior Damage ..................................................................................................................... 11 Occupant Data ......................................................................................................................... 11 UNIDENTIFIED VEHICLE...................................................................................................... 11 Description .............................................................................................................................. 11 Exterior Damage ..................................................................................................................... 11 Occupant Data ......................................................................................................................... 11 CRASH DIAGRAM.................................................................................................................... 12 APPENDIX A: Event Data Recorder Report for 2017 Honda Accord ............................... A-1 APPENDIX B: Vehicle Communication Interface Data Report for 2017 Honda Accord B-1 ii Special Crash Investigations Crash Avoidance Technology Investigation Office of Defects Investigation Case Number: DS18026 Vehicle: 2017 Honda Accord Location: California Crash Date: October 2018 BACKGROUND This report documents the investigation of a crash involving a 2017 Honda Accord (Figure 1) equipped with crash avoidance technology including a crash mitigating braking system (CMBS).1 The investigation was intended to examine the CMBS functionality and determine what role, if any, the braking system played in the crash. The CMBS did not activate prior to this crash. Given the crash configuration and speed difference between the Honda and the other vehicle, it would appear that the scenario met the CMBS activation conditions as stated in the Accord owner’s manual. According to an explanation provided by the original equipment manufacturer (OEM), the CMBS functioned as intended. Based on the OEM explanation of the forward collision